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Impacts of the COVID-19 lockdown on air quality and its association with human mortality trends in megapolis Mexico City
Air Quality, Atmosphere & Health ( IF 5.1 ) Pub Date : 2020-10-28 , DOI: 10.1007/s11869-020-00960-1
Gurusamy Kutralam-Muniasamy 1 , Fermín Pérez-Guevara 1, 2 , Priyadarsi D Roy 3 , I Elizalde-Martínez 4 , V C Shruti 4
Affiliation  

Mexico City is the second most populated city in Latin America, and it went through two partial lockdowns between April 1 and May 31, 2020, for reducing the COVID-19 propagation. The present study assessed air quality and its association with human mortality rates during the lockdown by estimating changes observed in air pollutants (CO, NO2, O3, SO2, PM10 and PM2.5) between the lockdown (April 1–May 31) and prelockdown (January 1–March 31) periods, as well as by comparing the air quality data of lockdown period with the same interval of previous 5 years (2015–2019). Concentrations of NO2 (− 29%), SO2 (− 55%) and PM10 (− 11%) declined and the contents of CO (+ 1.1%), PM2.5 (+ 19%) and O3 (+ 63%) increased during the lockdown compared to the prelockdown period. This study also estimated that NO2, SO2, CO, PM10 and PM2.5 reduced by 19–36%, and O3 enhanced by 14% compared to the average of 2015–2019. Reduction in traffic as well as less emission from vehicle exhausts led to remarkable decline in NO2, SO2 and PM10. The significant positive associations of PM2.5, CO and O3 with the numbers of COVID-19 infections and deaths, however, underscored the necessity to enforce air pollution regulations to protect human health in one of the important cities of the northern hemisphere. Graphical abstract Graphical abstract

中文翻译:

COVID-19 封锁对空气质量的影响及其与墨西哥城大都市人类死亡率趋势的关联

墨西哥城是拉丁美洲人口第二多的城市,它在 2020 年 4 月 1 日至 5 月 31 日期间经历了两次部分封锁,以减少 COVID-19 的传播。本研究通过估计在封锁(4 月 1 日至 5 月 31 日)和封锁前期间观察到的空气污染物(CO、NO2、O3、SO2、PM10 和 PM2.5)的变化,评估了空气质量及其与封锁期间人类死亡率的关系(1 月 1 日至 3 月 31 日)期间,以及将锁定期间的空气质量数据与前 5 年(2015-2019 年)的相同间隔进行比较。NO2 (− 29%)、SO2 (− 55%) 和 PM10 (− 11%) 的浓度下降,CO (+ 1.1%)、PM2.5 (+ 19%) 和 O3 (+ 63%) 的含量增加与封锁前相比,封锁期间。该研究还估计 NO2、SO2、CO、PM10 和 PM2.5 减少了 19-36%,与 2015-2019 年的平均值相比,O3 增加了 14%。交通量的减少以及汽车尾气排放的减少导致 NO2、SO2 和 PM10 的显着下降。然而,PM2.5、CO 和 O3 与 COVID-19 感染和死亡人数的显着正相关强调了在北半球重要城市之一执行空气污染法规以保护人类健康的必要性。图形摘要 图形摘要 强调了在北半球重要城市之一执行空气污染法规以保护人类健康的必要性。图形摘要 图形摘要 强调了在北半球重要城市之一执行空气污染法规以保护人类健康的必要性。图形摘要 图形摘要
更新日期:2020-10-28
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